/*
 *  * Copyright 2017 Skymind, Inc.
 *  *
 *  *    Licensed under the Apache License, Version 2.0 (the "License");
 *  *    you may not use this file except in compliance with the License.
 *  *    You may obtain a copy of the License at
 *  *
 *  *        http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  *    Unless required by applicable law or agreed to in writing, software
 *  *    distributed under the License is distributed on an "AS IS" BASIS,
 *  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  *    See the License for the specific language governing permissions and
 *  *    limitations under the License.
 */

package org.datavec.api.transform.transform;

import org.apache.commons.io.FileUtils;
import org.datavec.api.transform.ColumnType;
import org.datavec.api.transform.MathOp;
import org.datavec.api.transform.ReduceOp;
import org.datavec.api.transform.TransformProcess;
import org.datavec.api.transform.condition.ConditionOp;
import org.datavec.api.transform.condition.column.DoubleColumnCondition;
import org.datavec.api.transform.condition.column.NullWritableColumnCondition;
import org.datavec.api.transform.condition.sequence.SequenceLengthCondition;
import org.datavec.api.transform.filter.ConditionFilter;
import org.datavec.api.transform.filter.FilterInvalidValues;
import org.datavec.api.transform.reduce.Reducer;
import org.datavec.api.transform.schema.Schema;
import org.datavec.api.transform.sequence.comparator.NumericalColumnComparator;
import org.datavec.api.transform.sequence.comparator.StringComparator;
import org.datavec.api.transform.sequence.split.SequenceSplitTimeSeparation;
import org.datavec.api.transform.sequence.window.OverlappingTimeWindowFunction;
import org.datavec.api.transform.transform.integer.ReplaceEmptyIntegerWithValueTransform;
import org.datavec.api.transform.transform.integer.ReplaceInvalidWithIntegerTransform;
import org.datavec.api.transform.transform.sequence.SequenceOffsetTransform;
import org.datavec.api.transform.transform.string.MapAllStringsExceptListTransform;
import org.datavec.api.transform.transform.string.ReplaceEmptyStringTransform;
import org.datavec.api.transform.transform.string.StringListToCategoricalSetTransform;
import org.datavec.api.transform.transform.time.DeriveColumnsFromTimeTransform;
import org.datavec.api.writable.DoubleWritable;
import org.datavec.api.writable.IntWritable;
import org.datavec.api.writable.Text;
import org.datavec.api.writable.comparator.LongWritableComparator;
import org.joda.time.DateTimeFieldType;
import org.joda.time.DateTimeZone;
import org.junit.Test;
import org.nd4j.linalg.io.ClassPathResource;

import java.io.File;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static org.junit.Assert.assertEquals;

public class RegressionTestJson {

    @Test
    public void regressionTestJson100a() throws Exception {
        //JSON saved in 1.0.0-alpha, before JSON format change

        File f = new ClassPathResource("regression_test/100a/transformprocess_regression_100a.json").getFile();
        String s = FileUtils.readFileToString(f);

        TransformProcess fromJson = TransformProcess.fromJson(s);



        Schema schema = new Schema.Builder().addColumnCategorical("Cat", "State1", "State2")
                .addColumnCategorical("Cat2", "State1", "State2").addColumnDouble("Dbl")
                .addColumnDouble("Dbl2", null, 100.0, true, false).addColumnInteger("Int")
                .addColumnInteger("Int2", 0, 10).addColumnLong("Long").addColumnLong("Long2", -100L, null)
                .addColumnString("Str").addColumnString("Str2", "someregexhere", 1, null)
                .addColumnString("Str3")
                .addColumnTime("TimeCol", DateTimeZone.UTC)
                .addColumnTime("TimeCol2", DateTimeZone.UTC, null, 1000L).build();

        Map<String, String> map = new HashMap<>();
        map.put("from", "to");
        map.put("anotherFrom", "anotherTo");

        TransformProcess expected =
                new TransformProcess.Builder(schema).categoricalToInteger("Cat").categoricalToOneHot("Cat2")
                        .appendStringColumnTransform("Str3", "ToAppend")
                        .integerToCategorical("Cat", Arrays.asList("State1", "State2"))
                        .stringToCategorical("Str", Arrays.asList("State1", "State2"))
                        .duplicateColumn("Str", "Str2a").removeColumns("Str2a")
                        .renameColumn("Str2", "Str2a").reorderColumns("Cat", "Dbl")
                        .conditionalCopyValueTransform("Dbl", "Dbl2",
                                new DoubleColumnCondition("Dbl", ConditionOp.Equal, 0.0))
                        .conditionalReplaceValueTransform("Dbl", new DoubleWritable(1.0),
                                new DoubleColumnCondition("Dbl", ConditionOp.Equal, 1.0))
                        .doubleColumnsMathOp("NewDouble", MathOp.Add, "Dbl", "Dbl2")
                        .doubleMathOp("Dbl", MathOp.Add, 1.0)
                        .integerColumnsMathOp("NewInt", MathOp.Subtract, "Int", "Int2")
                        .integerMathOp("Int", MathOp.Multiply, 2)
                        .transform(new ReplaceEmptyIntegerWithValueTransform("Int", 1))
                        .transform(new ReplaceInvalidWithIntegerTransform("Int", 1))
                        .longColumnsMathOp("Long", MathOp.Multiply, "Long", "Long2")
                        .longMathOp("Long", MathOp.ScalarMax, 0)
                        .transform(new MapAllStringsExceptListTransform("Str", "Other",
                                Arrays.asList("Ok", "SomeVal")))
                        .stringRemoveWhitespaceTransform("Str")
                        .transform(new ReplaceEmptyStringTransform("Str", "WasEmpty"))
                        .replaceStringTransform("Str", map)
                        .transform(new StringListToCategoricalSetTransform("Str",
                                Arrays.asList("StrA", "StrB"), Arrays.asList("StrA", "StrB"),
                                ","))
                        .stringMapTransform("Str2a", map)
                        .transform(new DeriveColumnsFromTimeTransform.Builder("TimeCol")
                                .addIntegerDerivedColumn("Hour", DateTimeFieldType.hourOfDay())
                                .addStringDerivedColumn("Date", "YYYY-MM-dd", DateTimeZone.UTC)
                                .build())
                        .stringToTimeTransform("Str2a", "YYYY-MM-dd hh:mm:ss", DateTimeZone.UTC)
                        .timeMathOp("TimeCol2", MathOp.Add, 1, TimeUnit.HOURS)

                        //Filters:
                        .filter(new FilterInvalidValues("Cat", "Str2a"))
                        .filter(new ConditionFilter(new NullWritableColumnCondition("Long")))

                        //Convert to/from sequence
                        .convertToSequence("Int", new NumericalColumnComparator("TimeCol2"))
                        .convertFromSequence()

                        //Sequence split
                        .convertToSequence("Int", new StringComparator("Str2a"))
                        .splitSequence(new SequenceSplitTimeSeparation("TimeCol2", 1, TimeUnit.HOURS))

                        //Reducers and reduce by window:
                        .reduce(new Reducer.Builder(ReduceOp.TakeFirst).keyColumns("TimeCol2")
                                .countColumns("Cat").sumColumns("Dbl").build())
                        .reduceSequenceByWindow(
                                new Reducer.Builder(ReduceOp.TakeFirst).countColumns("Cat2")
                                        .stdevColumns("Dbl2").build(),
                                new OverlappingTimeWindowFunction.Builder()
                                        .timeColumn("TimeCol2")
                                        .addWindowStartTimeColumn(true)
                                        .addWindowEndTimeColumn(true)
                                        .windowSize(1, TimeUnit.HOURS)
                                        .offset(5, TimeUnit.MINUTES)
                                        .windowSeparation(15, TimeUnit.MINUTES)
                                        .excludeEmptyWindows(true).build())

                        //Calculate sorted rank
                        .convertFromSequence()
                        .calculateSortedRank("rankColName", "TimeCol2", new LongWritableComparator())
                        .sequenceMovingWindowReduce("rankColName", 20, ReduceOp.Mean)
                        .addConstantColumn("someIntColumn", ColumnType.Integer, new IntWritable(0))
                        .integerToOneHot("someIntColumn", 0, 3)
                        .filter(new SequenceLengthCondition(ConditionOp.LessThan, 1))
                        .addConstantColumn("testColSeq", ColumnType.Integer, new DoubleWritable(0))
                        .offsetSequence(Collections.singletonList("testColSeq"), 1, SequenceOffsetTransform.OperationType.InPlace)
                        .addConstantColumn("someTextCol", ColumnType.String, new Text("some values"))
                        .build();


        assertEquals(expected, fromJson);
    }

}
